1. Statistics of the embryo transfer industry around the world;Thibier;Embryo Transfer Newsletter,2003
2. World statistics for artificial insemination in cattle;Thibier;Livestock Prod Sci,2002
3. A simple method of estimating fifty percent end points;Reed;Am J Hyg,1938
4. Successful vitrification of early stage bovine in vitro produced embryos with the open pulled straw (OPS) method;Vajta;Cryo-Lett,1997
5. Viral contamination of embryos cryopreserved in liquid nitrogen;Bielanski;Cryobiology,2000